Enantiomers, Diastereomers, Or The Same?

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Master Organic Chemistry

Master Organic Chemistry

Күн бұрын

Пікірлер: 95
@kenziil7016
@kenziil7016 9 жыл бұрын
I read the section in my book twice, came to this video...understood it in minutes. Thank you!
@MasterOrganicChem
@MasterOrganicChem 9 жыл бұрын
Awesome! thanks for letting me know!
@AC-qo8oq
@AC-qo8oq 7 жыл бұрын
Finally! I get it! Nobody told me to check the R and S to see if they're. I have been staring at them for 20 mins trying to see how.. Thank you!
@MasterOrganicChem
@MasterOrganicChem 3 жыл бұрын
check the R and S yes, glad it helped
@nicoleswanson8579
@nicoleswanson8579 10 жыл бұрын
Great video! I have been prowling the web for a better understanding and the fact that you didn't talk about the bond rotation truly helped me. THANK YOU!
@MasterOrganicChem
@MasterOrganicChem 10 жыл бұрын
Yes! Thanks - everyone talks about bond rotations but it gets complex once a molecule gets big enough - glad you found this alternate method useful!
@medaphysicsrepository2639
@medaphysicsrepository2639 10 жыл бұрын
this is the BEST video for understanding these concepts, you're best work by far! i love it bc the bulk of it is based on examples, and its step by step. giving problems for me to do (and get wrong twice >.< but hey after watching them all I've got it down) makes it a model for how i wish organic chemistry tutorials were
@MasterOrganicChem
@MasterOrganicChem 10 жыл бұрын
thank you very much thomas underhill !
@LittleMissTutuz
@LittleMissTutuz 7 жыл бұрын
agreed!!!
@riverremis69
@riverremis69 8 жыл бұрын
Been struggling a bit trying to get a solid grip on stereochemistry -- & this seriously helped immensely!
@MasterOrganicChem
@MasterOrganicChem 8 жыл бұрын
Glad to hear it. Thanks!
@swanh6249
@swanh6249 7 жыл бұрын
You have the best organic chem videos!!! It's much more helpful than my professor lectures or reading the text book. Thank you so much!! Keep doing your great work :)
@MasterOrganicChem
@MasterOrganicChem 2 жыл бұрын
If you found this video helpful, you may want to check out our MOC membership plan, month-to-month / cancel anytime benefits here: bit.ly/2YctxPb
@nataliearias932
@nataliearias932 4 жыл бұрын
thank you so much! I've been stuck on this question since I took my stereochemistry test, and you really helped me comprehend what I was missing!
@gabriellemary
@gabriellemary 4 жыл бұрын
Saving me for my DAT 8 years later, thank you
@MasterOrganicChem
@MasterOrganicChem 3 жыл бұрын
Great to hear!
@vamparaz
@vamparaz 8 жыл бұрын
Thanks for your clear explanation and neat writing, very much appreciated!
@sanjanakapuria238
@sanjanakapuria238 4 жыл бұрын
you have literally saved me from a mental breakdown. god bless you sir
@TheBigSnek
@TheBigSnek 3 жыл бұрын
Lol good luck
@MasterOrganicChem
@MasterOrganicChem 3 жыл бұрын
You are so welcome with the help on enantiomers
@PreetKaur-fk3ds
@PreetKaur-fk3ds 8 жыл бұрын
Brilliant .... very well explained. Thanks a lot.
@ononchintuya2668
@ononchintuya2668 5 жыл бұрын
honestly i never comment but your videos are sooooooooooooooo helpful that i can not just stay without complimenting your videos
@MasterOrganicChem
@MasterOrganicChem 2 жыл бұрын
If you found this video helpful, you may want to check out our MOC membership plan, month-to-month / cancel anytime benefits here: bit.ly/2YctxPb
@dianethompson58
@dianethompson58 8 жыл бұрын
This video really helped me understand this concept. Thank you!
@harshitshukla7208
@harshitshukla7208 2 жыл бұрын
Please check If we rotate 3 bonds fixing one in the 2nd molecule, we will get the identical molecules sir. These are identical right?
@braydenpriebe6157
@braydenpriebe6157 2 жыл бұрын
What if #4 is in the plane of the screen/paper (solid line)? Is the correct answer R/S still the opposite of what's expected (clockwise/counterclockwise)?
@Tommy-zu6vb
@Tommy-zu6vb 3 жыл бұрын
I really don't understand the concept of R/S. At 4:46, you see the configuration goes clockwise which means it is R, due to the atom number. And then you say #4 atom which is H, is in front and therefore it suddenly is S??? It is still R when looking at the atomnumbers? I am so confused lost right now...
@jamesash6233
@jamesash6233 3 жыл бұрын
The rules say that when the #4 substituent is in the back (dash) , if 1,2 and 3 trace a clockwise path, the stereocenter is R. If 1,2 and 3 trace a counterclockwise path, the stereocenter is S. In our case, the #4 substituent is in the front (wedge). We *could* rotate the molecule so that the normal rules apply, but this is a pain to do on paper and it's easy to make a mistake. Therefore, what I did here was to use the "reverse rules". Since #4 is in the front (wedge) since 1,2 and 3 trace a clockwise path, we use the "reverse" of the rule, and therefore the stereocenter is S. It's a bit like looking in a rear-view mirror. Imagine looking at your friend in a rear-view mirror holding up his right hand, and he asks you what hand he is holding up. Since you know that you are looking in a mirror and the mirror reverses everything, you use the *reverse rules* so you say, "Left!".
@babyboikal
@babyboikal 9 жыл бұрын
At 5:36 for the molecule on the right, why don't you rotate counterclockwise in the direction of the 3rd priority atom first?
@BleuLou-ok6pg
@BleuLou-ok6pg 6 жыл бұрын
Thank you for making R/S plain and simple to understand!!! Quiz this Friday;--)
@MasterOrganicChem
@MasterOrganicChem 3 жыл бұрын
Glad you found the R and S understandable~
@mmmaheesa5946
@mmmaheesa5946 3 жыл бұрын
Thank you so much sir for your clear explanation !!!🤗🤗
@MasterOrganicChem
@MasterOrganicChem 3 жыл бұрын
You are most welcome
@trentkirkwood4195
@trentkirkwood4195 2 жыл бұрын
How are they enantiomers? They are not mirror images. I see the connections and the R/S but how does that correlate to being enantiomers when enantiomers have to be mirror images? Non superimposable mirror images I believe correct me on that.
@yonipool8683
@yonipool8683 9 жыл бұрын
Thank you for posting this! it really is so helpful !
@MasterOrganicChem
@MasterOrganicChem 3 жыл бұрын
You are welcome
@pinky7209
@pinky7209 8 жыл бұрын
amazing clarity
@rossbeattie8947
@rossbeattie8947 8 жыл бұрын
If number 4 is in the front its opposite - why was i never told this?!
@MasterOrganicChem
@MasterOrganicChem 3 жыл бұрын
If you look at your left hand in a mirror, it looks like it's your right hand. If you *know* you're looking in a mirror, you can correct for this by using "opposite" rules (right is left, left is right) and therefore you get the correct answer! Same principle! :-)
@mishraji7848
@mishraji7848 2 жыл бұрын
Your Vedio is just amazing....loves from IND
@allbeen
@allbeen 8 жыл бұрын
what do you mean by connectivity ? same atoms ?
@thinkfi781
@thinkfi781 3 жыл бұрын
Thanks for helping me to do the questions on enantiomers sir😀😀😀
@MasterOrganicChem
@MasterOrganicChem 3 жыл бұрын
It's my pleasure to help you with your questions on enantiomers
@zaziechapellier4760
@zaziechapellier4760 3 жыл бұрын
Amazing! Thank you!
@MasterOrganicChem
@MasterOrganicChem 3 жыл бұрын
Thank you too!
@christianalexandermarion
@christianalexandermarion 6 жыл бұрын
Explained it better in 7 minutes than my org chem professor ever did at my 40K, a year, university
@MasterOrganicChem
@MasterOrganicChem 6 жыл бұрын
Awesome. Thank you!
@kattran3798
@kattran3798 6 жыл бұрын
Can anyone explain? I did my usual way of putting H in the back for the first molecule, but it still goes clockwise for me. I'm not seeing how it would go counter clock wise!
@rimadevi2011
@rimadevi2011 5 жыл бұрын
Me2🤔
@MasterOrganicChem
@MasterOrganicChem 3 жыл бұрын
The way the first molecule is drawn, 1, 2 and 3 priorities *do* go clockwise. However, R/S is always determined with #4 being in the back. Since #4 is in the *front* here, we use "opposite rules". So 1, 2, and 3 going clockwise actually results in an S stereocenter when #4 is in the front. If you make a little model and rotate it around so that you put #4 in the back, you'll see that 1,2 and 3 "magically" now go counter-clockwise. So this little "opposite" trick saves you the time of making models, etc.
@طبوصيدلة
@طبوصيدلة 9 жыл бұрын
oh ! this is realy awesome , thank you MR i understand now and then you save my mark for stereochemistry ^_^ thank you very much
@Bella24Forever
@Bella24Forever 8 жыл бұрын
I am not sure where the other video you were talking is located
@MasterOrganicChem
@MasterOrganicChem 3 жыл бұрын
Which topics were you interested in, I can hel send links
@GoldCattt
@GoldCattt 4 жыл бұрын
Thank you
@MasterOrganicChem
@MasterOrganicChem 3 жыл бұрын
Welcome!
@thesolitaryreaper2388
@thesolitaryreaper2388 5 жыл бұрын
Sir I have confusion with the 1st compound for me it seems to be R configuration as it is clockwise but you said it's S. Please help me to get rid of this query
@roseblanche9073
@roseblanche9073 5 жыл бұрын
Hi , when H is in the front , you need to reverse the configuration, it was R clockwise but the H is in the front so reverse it to become S.😊
@thesolitaryreaper2388
@thesolitaryreaper2388 5 жыл бұрын
@@roseblanche9073 I got it, thanks
@danamclemore3805
@danamclemore3805 8 жыл бұрын
thanks a lot, dude! helpful
@tiibrahim5714
@tiibrahim5714 6 жыл бұрын
Thanks sir u've cured my sickness
@husseinsa5050
@husseinsa5050 9 жыл бұрын
Thank you sooo much
@hariommeena7162
@hariommeena7162 8 жыл бұрын
this is really good
@tadevosmakaryan2378
@tadevosmakaryan2378 8 жыл бұрын
Arent they constitutional isomers... however they are better labeled as enantiomers . Doesn't mean they are not constitutional isomers. They are constitutional isomers, not confirmation isomers ( because there is no rotation about a sigma bond) , but are stereoisomers, more specifically enantiomers.
@01107345
@01107345 7 жыл бұрын
Enantiomers are mirror images. Two molecules can't be mirror images if they're constitutional isomers.
@rishabbairagi2904
@rishabbairagi2904 9 жыл бұрын
Couldn't understand what is R and S.
@hafizjamshidi251
@hafizjamshidi251 7 жыл бұрын
Awsome video...Thanks
@MasterOrganicChem
@MasterOrganicChem 3 жыл бұрын
thank you glad you found this helpful
@Zch73
@Zch73 10 жыл бұрын
Great video
@MasterOrganicChem
@MasterOrganicChem 3 жыл бұрын
thank you
@dianethompson58
@dianethompson58 8 жыл бұрын
How should I should I rotate the molecule if the hydrogen is in the plane of the paper?
@MasterOrganicChem
@MasterOrganicChem 3 жыл бұрын
If the H atom is in the plane, here's one tactic that you can do, which employs the "single swap rule". Swapping *any two groups* with each other on a stereocenter, will flip that stereocenter from R to S (or vice versa). Just like looking in a mirror *swaps* the appearance of your left and right hands (your left appears to be right, and your right appears to be left). Knowing this, *swap* the H in the plane with whatever group is in the back (wedge). Redraw. *Then* determine R and S. Once you've determined R and S, you then need to correct for the fact that you did a single swap (just like when looking at your hand in a mirror, you need to correct for the fact that you're looking in a mirror to be able to determine the "correct" hand - it will be the opposite). So the correct R/S value will be whatever is the opposite of the R/S you determined in the swapped version.
@sravanvenus1180
@sravanvenus1180 7 жыл бұрын
thanx a ton... exceptinal explanation... please do help us more
@MasterOrganicChem
@MasterOrganicChem 3 жыл бұрын
Thank you for the response, I will be adding more videos and explanations
@kdagem4217
@kdagem4217 7 жыл бұрын
But they arent mirror images
@RoflJoker1994
@RoflJoker1994 9 жыл бұрын
i dont understand the first explanation.. its counterclockwise coz 4 is in the front? wut?
@MasterOrganicChem
@MasterOrganicChem 3 жыл бұрын
R and S is determined with the #4 group being in the back. In the first example, #4 is in the front. Therefore we can get the same answer if we apply "opposite" rules. Since 1, 2 and 3 proceed in a clockwise direction when #4 is in the front (wedge), they must proceed in a *counter clockwise* direction when #4 is in the back (dash). Therefore we get S.
@arshitasaini876
@arshitasaini876 5 жыл бұрын
such a good video, thanks :)
@ononchintuya2668
@ononchintuya2668 5 жыл бұрын
so sad that i found these videos after failing on my orgo exam
@MasterOrganicChem
@MasterOrganicChem 3 жыл бұрын
thank you so much! Spread the word if you know of others who could find our organic chemistry videos useful!
@purplejakman
@purplejakman 7 жыл бұрын
What if it's above or to the side??????? Only a video for specific problems are terrible
@MasterOrganicChem
@MasterOrganicChem 7 жыл бұрын
It is true that if the H is on the side, one cannot use the "opposite" rule. However one can still use the "single swap" rule. Redraw the molecule with the H in the back and the "back" group on the side, and determine R/S as normal. Then flip the result.
@raghadalhabshi1463
@raghadalhabshi1463 2 жыл бұрын
Oh I love you
@MasterOrganicChem
@MasterOrganicChem 2 жыл бұрын
Glad it helped! I would like to invite you to check out our monthly (no long term commitment) membership with over 1500 quizzes, flashcards the reaction guide and more. Here's access: bit.ly/2YctxPb
@subhendunayak
@subhendunayak 4 жыл бұрын
Continue
@MasterOrganicChem
@MasterOrganicChem 2 жыл бұрын
If you found this video helpful, you may want to check out our MOC membership plan, month-to-month / cancel anytime benefits here: bit.ly/2YctxPb
@subhendunayak
@subhendunayak 2 жыл бұрын
@@MasterOrganicChem I don't want paid plans
@Kkkkkkkkkkk364
@Kkkkkkkkkkk364 7 жыл бұрын
awsome
@MasterOrganicChem
@MasterOrganicChem 3 жыл бұрын
So glad the R and S video was helpful to you
@asmabibi8846
@asmabibi8846 9 жыл бұрын
ssuuuper
@purplejakman
@purplejakman 7 жыл бұрын
Guys don't listen to his "rule" about switching, I have tried the rule and it does not work, I then showed it to my professors and they said it has no consistency, this guy is a fake 100%
@purplejakman
@purplejakman 7 жыл бұрын
To be more specific if the "front" H was pointing the other way it would not follow this rule, even if it is pointing to the front
@MasterOrganicChem
@MasterOrganicChem 7 жыл бұрын
If you flip any two groups on a chiral center it will flip R to S or vice versa. Try it.
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